Process of making filtering material.



No. 854,043. PATENTED MAY 21, 1907. G. M. KNEUPER.

PROCESS-OF MAKING FILTBRING MATERIAL.

APPLICATION FILED 00T.3. 1906.

2 SHEETS-SHEET l.

/g mic? 4& B) a mm" mm A TTOHNE YS PATENTED MAY 21, 1907.

G. M. KNEUPER. PROCESS OF MAKING PIL'I'ERING MATERIAL.

APPLICATION FILED 00T.3, 1906.

2 SHEETS-SHEET 2.

INVENTOH M fii 'm a-W W/TNESSES .UNITED STATES.,IPATENTIOFFICE;

GEORGE M. KNEUPER, o'R NEW YORK, N. Y-., ASSIGNOR oEoN -THiRD'To GEORGE KN UPERAN ONE-THIRD .To KATE KNEUPER.

Specification of Letters Patent.

' PRQQESSOF MAKING FILTERING MATERIAL.

Patented May 21, 907.

e F Original application filed hiay 29, 1906, Serial No. 319,280. Divided and this application filed October 3,1906. Serial No. 337,168.

To all whom, it may concern: I

' Be it known that I, GEORGE M. KNEUPER, a citizen of the United States, and a resident of the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Processes of Making Filtering Material, of which the following is a specification.

This invention relates to anew filtering material whichis intended to allow viscous and other liquid and semi-liquid matters to pass through it with reasonable speed. Filters are usuallymade dependent-upon the existence in the filtering bodies of 'channels or passages, but in most filtering bodies known to me these passages are not regulated in the process of manufacture and are frequently interrupted, being mere cavities in whichthe matter to be filtered is apt to lodge and from which it is almost impossible to dislodge it. M p 1 The object of my invention is to make afilter in which the passages for the material to be filtered are rendered continuous, and regulated so. that they shall be continuous or practically so. a i y In making my improved filter I use an apparatus which is illustrated in the accompanying drawing, in which igure 1 represents a top view of such apparatus; Fig. 2 a vertical central section thereof, Fig. 3 a vertical section-on a very much enlarged scale of my improved filter; Fig. 4 is an elevation partly in section show ing one way of using my improved filtering material; and Figf .5 is a section thereof on line 55 of Fig. 4.

In making my improved filter the process is as follows: I take a vat A' which is open on top and has an'outlet opening at a near the bottom, and a plug for closing the same. Upon the bottom of this vat are arranged series of slats b, uponwhich I lay a wire screen a, so that water contained'in; the vat may get under this wire screen. U on this .Wire screen a I then place a layer ing a sheet of pure cellulose or cotton of that kind in which the fibers run parallel to each other. I then fill the tank nearly full ofwater and place in it'an amount of cotton pulp or wood pulp, preferably the kind known as sulfite pulp, made from poplar wood, suflicient to make when collected, the intermedi- 'ate layer e (see Fig. 3) of my filter. The

pulp is suspended in the water contained in -.-it carries, up and down.

of cotton, be-

drew the water by opening the holes a, I

would obtain an ordinary wood pulp filter with the pores irregularly distributed, many of them more cavities without outlets, and many of them therefore useless for filtering purposes. But in order to obviate the creation of these incongrhous passages, and to make the filter passages continuous and dis- 6 5 tribute them evenly, I use aneedle-board B which is set at the lower side with close nee- 'dles C or needle-like projections. The drawing (Fig. 2) shows of course only one row of such needles, but there are repeated rows, as many as the board-will hold, according to the width of the tank A. In the alternating rows it is preferable that the needles break joints. Sixty-four needles to the square inch is an eflic-ient number. The board B has suitable guide-loops f which embrace suitable stationary guide posts g, and is connected by the rod- 72, with a crank 71 or" othersuitable mechanism for ra idly moving the board B and the nee les which 0 In operation these needles are forced rapidly through the .water and partly into the cotton layer d, carrying the pulp in the tank close to and partly into said layer. Each needle in de- 5 scending, displaces some of the" ulp, and as the descent is very rapid, and t ere-ascent equally rapid, the pulp fibers will gradually be given an; approximately vertical d1rec-' tion, thus extending about at a ri ht an le to 9 the fibers of the cotton layer (Z. the here.

penetrate into the cotton layer (see Fig. 3), the two layers (1 and 6. will be firmly .con-

nected. The water isthen allowed to run off, byopening the outlet a, and thereupon 1 the needle-board is a ain reciprocated up and down, to more firm y drive the pulp fibers into the cotton layerand insure a more regular distribution and arrangement of the pulp fibers. I When this operation has been car- 1 ried en for'a'sufiicient length of time, I-put another layer of cotton 1' upon the intermediate layer e, having first removed the board B. This layer should be of the same kind as the layer d; that is, with the fibers all running in 1 5 the same direction, and preferably parallel to those of the lower layer (1. This brings the pulp body of the filter into positionbetween the two cotton layers d and 9' (see 3) and results in the production of a filter 111 which 1 10 796,519, dated August the main body a has transverse pores, all. or nearly all, of which are continuous.

Vith the aid of this filter I can operate on viscous liquids and the like, much more rapidly than with any other filter heretofore known. The filter body filtering and analogous purposes, if desired.

A sheet of filtering materialniade as above described can ner, but I prefer to wrap it upon a perforated cylinder D of metal or other stiff material as shown in Figs. 4; and 5 in substantially the same'manner as disclosed in my Patent X0. 8, 1905. Care should be taken however, to have the fibers of the sheets (I and j run lengthwise of the cylinder, that is, trans 'ersely to the direction of the flow of the liquid, so that the fibers of the pulp layer e will run substantially parallel to the direction in which the liquid passes through the filter.

It is to be understood that while I have shown the two edges of the filtering sheet abutting against each other in Fig.5, in prac tice these edges preferably overlap. 1

This application is a division of one filed-by me in the United States Patent Oifice on May 29, 1906, Serial No. 319,280.

hat I claim is:

1. The process herein described of making a pulp filter, which process consists in reciprocating a series of needles through the water in which the pulp is suspended.

2. The herein-described process of making a filter which consists in pouring a body of liquid containing pulp in suspension over a sheet of fibrous filtering material, and then driving the individual pulp fibers downward to give them a substantially vertical direction. Y

6 can be used for be used in any suitable mansheet, thus causing liquid con'' body of 1 liquid containing pulp in suspension over a vidual fibers downward to cause them to'as slume a substantially vertical direction, then withdrawing the water, and thereupon again driving the fibers downward to perfect their vertical arrangement.

5. T heherein-described process of making filters, which consists in pouring a liquid containing pulp in suspension over a sheet of fibrous filtering inaterial, driving the individual pulp fibers downward into the said them to assume a substantially vertical direction, then removing the water andthereupon again driving the pulp fibers downward to perfect their vertical arrangement. I

6. The herein-described apparatus for making apulp filter,-wliich apparatus con-- sists of a tank, a needle-board having closely set needles and mechanism for rapidly reciprocating said needle-board. r

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

-GEORGE M. K'NEUPER.

itnesses'.

Jon)" LOTKA, JOHN A. KEHLENBECK. 

